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Bi-convex lenses are manufactured with an identical convex surface on both
sides of the lens.
- Bi-convex lenses have positive focal lengths and form both real and
virtual images.
- Aberrations such as coma,
distortion, and chromatic aberration almost exactly cancel out at unit
conjugate ratios due to the symmetry. Aberrations will increase as conjugate
ratios depart from unity.
- Recommended for virtual imaging of real objects, and for positive
conjugate ratios from approximately 0.2 to 5. Values are wavelength sensitive.
- Antireflection coatings can be ordered as an
option.
- We also provide precision grade bi-convex lens with
tighter manufacturing tolerances.
- Bi-convex elements have a Minimum Order Quantity (MOQ) ranging from 100
to 1,000 units.
General Specifications:
Parameter |
Value |
Default unit |
mm |
Material |
BK7 |
Diameter tolerance |
+0, -0.1mm (+0, -0.15mm for diameter>75mm) |
Clear aperture |
90% |
Focal length tolerance |
+/-2% (+/-5% for 400 series) |
Center thickness tolerance |
+/-0.2mm |
Centration |
3 arc min |
Surface quality |
60-40 |
PN: |
DXS027
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Description: |
Bi-convex lens standard grade BK7 D= 21.0 EFL= 20.0
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Material: |
BK7
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EFL: |
20
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Diameter: |
21
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Index: |
1.51872
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BFL: |
17.09
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Tc: |
8.2
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Te: |
1.96
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Radius1: |
19.239
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Radius2: |
-19.2385087095678
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Volume Price: |
Request Volume Quote |
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